philba

also, burning gasoline (or any other liquid flamable) will cling to what ever it comes in contact with. It stays on the ground and burns upward. Hydrogen rises as it burns so while it will still cause burns in people, the burns are generally less severe that gasoline burns. Also, the products of hydrogen combustion are less toxic than gasoline/jp4/... since it doesn't cling to other materials and thus causes less secondary combustion. I recall reading that the number 1 cause of death in survivable air crashes was smoke inhalation and not the actual fire.